Use este identificador para citar ou linkar para este item:
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1159752
Título: | Economic evaluation of biological nitrogen fixation in flooded rice cultivation in subtropical lowlands. |
Autoria: | WANDER, A. E. MATTOS, M. L. T. |
Afiliação: | ALCIDO ELENOR WANDER, CNPAF; MARIA LAURA TURINO MATTOS, CPACT. |
Ano de publicação: | 2023 |
Referência: | Journal of Agriculture and Rural Development in the Tropics and Subtropics, v. 124, n. 1, p. 57-63, 2023. |
Conteúdo: | This study aimed to assess the economic viability of biological nitrogen fixation in flood rice cultivation in subtropical lowlands. A field experiment of seven treatments was carried out during the cropping seasons 2015/16, 2017/18, 2018/19 and 2019/20 at the Lowland Experimental Station of Embrapa, in Pelotas, RS, Brazil. The evaluated treatments were: (1) negative control (without N and inoculant); (2) positive control with recommended N-fertilisation (120 kg N ha−1, without inoculant) (standard recommendation); (3) inoculant 1 (accessions CMM 174 + CMM 175 + CMM 179); (4) inoculant 2 (accessions CMM 176 + CMM 197 + CMM 205); (5) combination of reduced N-fertiliser doses (90 kg N ha−1) + inoculant 1; (6) combination of reduced N-fertiliser doses (90 kg N ha−1) + inoculant 2; and (7) commercial inoculant [Azospirillum brasilense (strains Ab-V5 and Ab-V6)]. A partial budget was used to compare evaluated treatments with the standard recommendation regarding nitrogen fertilisation. Inoculant 2 composed of bacterial accessions CMM 176 (Rhizobium sp.), CMM 197 (Bacillus sp.) and CMM 205 (Aeromicrobium sp.) combined with reduced mineral nitrogen fertilisation [90 kg N ha−1 (applied in top dressing)] demonstrates the best agroeconomic efficiency in the production of irrigated rice in subtropical lowlands with the cultivar BRS Pampa. |
Thesagro: | Arroz Nitrogênio Inoculante Fixação de Nitrogênio |
NAL Thesaurus: | Irrigated soils Nitrogen Nitrogen fixation Economic impact Subtropical soils Lowlands |
Palavras-chave: | Diazotrophic bacteria |
ISSN: | 2363-6033 |
Digital Object Identifier: | https://doi.org/10.17170/kobra-202306128202 |
Tipo do material: | Artigo de periódico |
Acesso: | openAccess |
Aparece nas coleções: | Artigo em periódico indexado (CNPAF) |
Arquivos associados a este item:
Arquivo | Tamanho | Formato | |
---|---|---|---|
Journal-agr-rural-development-tropics-subtropics-2023.pdf | 124,91 kB | Adobe PDF | Visualizar/Abrir |